nc

### Troubleshooting Rotary Table Problems

Problem

Readings across the part have a large error.

Solution

The tool length and rotary table location are not matched. Rerun the journal file while adjusting the rotary table center. Remember that the rotary table data will be reloaded from CncMachineData/<machine name>/rotab.dat when the machine is selected and restored when cleared.

For PC-DMIS NCI, the standard rotab.dat file in the installation directory is used.

If the results improve with center adjustment, try recalibrating the rotary table. If thermal drift is an issue, you can include a local recalibration of the spindle length (Z) in the PC-DMIS measurement routine by measuring a known location.

Problem

The path goes the wrong way

Solution

Clockwise/Counterclockwise is wrong in Rotary table setup.

Problem

Motion is not generated for the axis

Solutions

Enable the rotary table in PC-DMIS.

You must enable the rotary table option in your LMS license or portlock.

Correct the Axis code in dialog box that defines the machine in the NC Gateway server application.

Problem

Rotary table results do not track table angle for Fanuc controls

Solution

Verify that the wrong table angle is being included with every point in the journal file (or the machine readout if NCI). If it is, position the table at a known location and write a simple MDI measurement routine to read the location.

#530 = # 5004

If the value of the arbitrary temporary variable #530 is wrong, review the controller / machine documentation to find the right address. #5004 is typical for the A axis, but the axes may not be linearly mapped against controller addresses. Change the value in the machine definition, save all, and restart the NC Gateway server application.